| Issue |
E3S Web Conf.
Volume 168, 2020
II International Conference Essays of Mining Science and Practice
|
|
|---|---|---|
| Article Number | 00057 | |
| Number of page(s) | 9 | |
| DOI | https://doi.org/10.1051/e3sconf/202016800057 | |
| Published online | 06 May 2020 | |
Scientific and technical aspects of grouting of marginal rocks of mine workings
1
Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine, 49005, Dnipro, Simferopolska Str., 2a, Ukraine
2
Dnipro University of Technology, 49005, Dnipro, Dmytra Yavornytskoho Ave., 19, Ukraine
* Corresponding author: mspdop@i.ua
The goal of the paper is to justify ways to achieve maximum radius of extent of grouting mortar in a rock massif and to maximize filling of cavities and cracks with minimal openings. Filling of cavities and cracks directly influences a “massif – roadway – safety structure” system. Some scientific and technical aspects of grouting and injecting inorganic binders into marginal rocks are considered. Advantages of usage of triple plunger pumps in injecting units are determined. The influence of pulsation on a condition and process of grouting mortar extension is justified. It is established that under equal operating conditions, pulsations created by a triple plunger pump reduce mortar viscosity by 15 %, and a radius of extent of mortar based on grouting cements is increased by an average of 12 %, and with usage of very finely dispersed substances – up to 20 %. Suggested recommendations significantly improve the technology of grouting of marginal rocks and concrete structures.
© The Authors, published by EDP Sciences, 2020
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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